Bridge, System, Bridge Control Method and Program Recording Medium

1. A bridge control method comprising: transmitting a BPDU (Bridge Protocol Data Unit) packet, wherein the BPDU packet is the BPDU packet of an STP (Spanning Tree Protocol) and includes a MAC (Media Access Controller) address field that includes information indicating an occurrence of a failure other than a failure of a bridge identified by the MAC address field.

2. A bridge, comprising: a BPDU (Bridge Protocol Data Unit) sender which transmits a BPDU packet, wherein the BPDU packet is the BPDU packet of an STP (Spanning Tree protocol)and includes a MAC (Media Address Controller) address field that includes information indicating an occurrence of a failure other than a failure of the bridge identified by the MAC address field.

3. The bridge according to claim 2 , in that said BPDU sender transmits the BPDU packet to another bridge via a network.

4. The bridge according to claim 2 , in that said BPDU packet includes 0 in highest 2 bits of said MAC address field.

5. The bridge according to claim 3 , in that said BPDU packet includes 0 in highest 2 bits of said MAC address field.

6. The bridge according to claim 2 , comprising a MGMT (ManaGeMenT board), in that said MGMT is included in a CELL which is a base board of a server system, and said BPDU packet includes mounted location information of the destination CELL and of the MGMT in said MAC address field.

7. The bridge according to claim 3 , comprising a MGMT (ManaGeMenT board), in that said MGMT is included in a CELL which is a base board of a server system, and said BPDU packet includes mounted location information of the destination CELL and of the MGMT in said MAC address field.

8. The bridge according to claim 4 , comprising a MGMT (ManaGeMenT board), in that said MGMT is included in a CELL which is a base board of a server system, and said BPDU packet includes mounted location information of the destination CELL and of the MGMT in said MAC address field.

9. The bridge according to claim 2 , comprising: a BPDU receiver which receives the BPDU packet including the failure information where in the packet is the BPDU packet of the STP; and an error handler which performs a process based on a system operation control specification when there is a failure by referencing said failure information which is included in the BPDU packet which said BPDU receiver received.

10. The bridge according to claim 3 , comprising: a BPDU receiver which receives the BPDU packet including the failure information wherein the packet is the BPDU packet of the STP; and an error handler which performs a process based on a system operation control specification when there is a failure by referencing said failure information which is included in the BPDU packet which said BPDU receiver received.

11. The bridge according to claim 4 , comprising: a BPDU receiver which receives the BPDU packet including the failure information wherein the packet is the BPDU packet of the STP; and an error handler which performs a process based on a system operation control specification when there is a failure by referencing said failure information which is included in the BPDU packet which said BPDU receiver received.

12. The bridge according to claim 5 , comprising: a BPDU receiver which receives the BPDU packet including the failure information wherein the packet is the BPDU packet of the STP 1 ; and an error handler which performs a process based on a system operation control specification when there is a failure by referencing said failure information which is included in the BPDU packet which said BPDU receiver received.

13. The bridge according to claim 2 , comprising: a port which has a port role of any one of RP (Root Port), AP (Alternate Port), and BP (Backup Port); and a port state changing unit which changes a port status of said port from Discarding to Listening.

14. The bridge according to claim 3 , comprising: a port which has a port role of any one of RP (Root Port), AP (Alternate Port), and BP (Backup Port); and a port state changing unit which changes a port status of said port from Discarding to Listening.

15. The bridge according to claim 4 , comprising: a port which has a port role of any one of RP (Root Port), AP (Alternate Port), and BP (Backup Port); and a port state changing unit which changes a port status of said port from Discarding to Listening.

16. The bridge according to claim 5 , comprising: a port which has a port role of any one of RP (Root Port), AP (Alternate Port), and BP (Backup Port); and a port state changing unit which changes a port status of said port from Discarding to Listening.

17. The bridge according to claim 6 , comprising: a port which has a port role of any one of RP (Root Port), AP (Alternate Port), and BP (Backup Port); and a port state changing unit which changes a port status of said port from Discarding to Listening.

18. A system, comprising: a first bridge including a BPDU (Bridge Protocol Data Unit) sender which transmit a BPDU packet, wherein the BPDU packet is the BPDU packet of an STP(Spanning Tree Protocol) and includes a MAC (Media Access Controller) address field that includes information indicating an occurrence of a failure other than a failure of the first bridge identified by the MAC address field; and a second bridge connecting with said first bridge via a network and receiving said BPDU packet.

19. A computer-readable recording medium recording thereon a program which makes a computer function as: a sender which transmits a BPDU (Bridge Protocol Data Unit) packet, wherein the BPDU packet is the BPDU packet of an STP (Spanning Tree Protocol) and includes a MAC (Media Access Controller) address field that includes information indicating an occurrence of a failure other than a failure of a bridge identified by the MAC address field.